Merge branch 'remove_group_policy_add_rules' into 'master'

Remove now unnecessary `additional_rules!` method from GroupPolicy

See merge request !9595

app/policies/group_policy.rb

@@ -33,8 +33,6 @@ class GroupPolicy < BasePolicy
     if globally_viewable && @subject.request_access_enabled && !member
       can! :request_access
     end
-
-    additional_rules!(master)
   end
 
   def can_read_group?
@@ -45,8 +43,4 @@ class GroupPolicy < BasePolicy
 
     GroupProjectsFinder.new(@subject).execute(@user).any?
   end
-
-  def additional_rules!(master)
-    # This is meant to be overriden in EE
-  end
 end